The document discusses the future perfect continuous tense, which is used to express something that will continue happening until a specific future time. It can show cause and effect relationships. The future perfect continuous uses the auxiliaries "will have been" and "going to have been" and follows standard affirmative, negative, and interrogative sentence structures. Examples are provided to illustrate its use in describing actions that will be ongoing up until a particular point in the future.

2.  We use the future perfect continuous to
express something that will continue
happening until a specific moment or
time in the future.
 The use of future perfect continuous is a
way to show “cause and effect”
 The future perfect continuous uses two
different auxiliaries: “will have been” and
“going to have been”

3.  Affirmative:
- Subject +“will have been”+ principal verb
- Subject + auxiliary verb (to be) + “going
to have been” + gerund

4. Examples:
- I will have been living in the same house
for 2 years tomorrow.
- I am going to have been cleaning the
house for 3 hours by the time she arrives.

5.  Negative:
-Subject + “will” + “not” + “have been” +
principal verb
-Subject + auxiliary verb (to be) + “not” +
“going to have been” + gerund

6. Examples:
-I wont have living in the same house for
2 years tomorrow.
-I am not going to have been cleaning
the house for 3 hours by the time she
arrives.

7.  Interrogative:
- “Will”+ subject + “have been”+
principal verb
- Auxiliary verb (to be) + Subject +
“Going to have been” + gerund

8. Examples:
- Will I have been living in the same
house for 2 years tomorrow?
- Am I going to have been cleaning the
house for 3 hours by the time she arrives?

9.  The use of future perfect continuous is a way to
show “cause and effect”.
Examples:
- I need to change my house, because I will have
been living in the same one for 2 years tomorrow.
- When she arrives, she will be proud of her house,
because I am going to have been cleaning it up
for 3 hours.